1. chem

    methyl salicylate has a mass percent composition of 63.2% C, 31.6% O, and 5.26% H.The mass of one molecule of the compound is 2.53 x 10^-22.Determine the empirical formula and the molecular formula for methyl salicylate.

    asked by pop on July 12, 2011
  2. Chemistry

    A student did the Synthesis of Salicylic Acid experiment starting with 3.89 g of methyl salicylate (C8H8O3) and using 40 mL of 6.0 M NaOH. To evaluate her success she needs to determine the limiting reagent. The reaction goes as follows: C8H8O3 + H2O ==>

    asked by Lena on November 16, 2010
  3. Chemistry

    Monosodium glutamate (MSG), a food-flavor enhancer, has been blamed for “Chinese Restaurant Syndrome,” the symptoms of which are headaches & chest pains. MSG has the following composition by mass: 35.51 percent C, 4.77 percent H, 37.85 percent O, 8.29

    asked by Sara on March 6, 2015
  4. Chemistry

    Monosodium glutamate (MSG), a food-flavor enhancer, has been blamed for “Chinese Restaurant Syndrome,” the symptoms of which are headaches & chest pains. MSG has the following composition by mass: 35.51 percent C, 4.77 percent H, 37.85 percent O, 8.29

    asked by <3 on January 29, 2010
  5. chem

    The mass of one molecule of the compound is 2.53 x 10^-22.Determine the molecular formula for methyl salicylate. emprical formula = C8H803

    asked by bella on July 12, 2011
  6. chemistry

    Monosodium glutamate (MSG), a food-flavor enhancer, has been blamed for “Chinese Restaurant Syndrome,” the symptoms of which are headaches & chest pains. MSG has the following composition by mass: 35.51 percent C, 4.77 percent H, 37.85 percent O, 8.29

    asked by Sara on March 6, 2015
  7. organic chemistry

    when i add methyl salicylate to aqueous sodium hydroxide, immediately a white solid forms... that is sodium salicylate is it?? Since it hasn't been heating under reflux yet.

    asked by Anonymous on March 18, 2013
  8. CHEMISTRY

    I'm trying to figure out the percent composition of a mixture of an unknown (a combination of NaHCO3 and NaCl). Here's my data: Mass of 150mL of empty beaker: 80.937g Mass of 150mL beaker w/ unknown: 81.957g Mass of 150mL beaker w/ unknown after reaction:

    asked by Liam on October 1, 2016
  9. Chemistry

    How do you determine the percent composition by mass of a 100 g K2SO4 solution containing a 20-g solute. What is the mole percent composition of the solute, assuming that the solution consists of 100 g water and 20 g of K2S04? For percent composition of

    asked by Sofia on June 23, 2009
  10. chemistry

    1.to calculate the percent by massof an element in a known compound, divide the mass of the element in one mole by the _______and multiply by 100%. A(n) _______formula represents the lowest________ratio of the elements in a compound. It can be calculated

    asked by Anonymous on March 24, 2009
  11. chemistry check my work

    C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield? percent is 77.l1% is this correct?

    asked by Molly on April 15, 2010
  12. Chemistry Lab

    chemical equation for saponification of methyl salicylate in 6 M NaOH. C8H8O3 + NaOH ---> C7H6O3Na + CH3OH + H2O is this the right reaction? is saponification like hydrolysis? what is the hydrolysis of methyl salicylate in 6M HCL? C8H8O3 + HCl --->

    asked by 657 on November 27, 2012
  13. Chemistry

    Part 1: Find the % by mass of each element in camphor (C10H20O). Step 1: Find the atomic mass of each element in the molecule. Atomic Mass of C: 12.0107 Atomic Mass of H: 1.00794 Atomic Mass of O: 15.9994 Step 2: Find the mass combination of each element.

    asked by Chelsea on September 21, 2015
  14. chemistry

    what is the percent composition by mass of water in a compound with a gram formula mass of 4905 g/mol

    asked by mike on November 28, 2010
  15. Chemistry

    I need some help with some of these questions: The action of bacteria on meat and fish produces a poisonous compound called cadaverine. As its name implies, it stinks! It is 58.77 percent carbon, 13.81 percent hydrogen, and 27.40 percent nitrogen. Its

    asked by Matthew on February 20, 2012
  16. Chemistry

    I need some help with some of these questions: The action of bacteria on meat and fish produces a poisonous compound called cadaverine. As its name implies, it stinks! It is 58.77 percent carbon, 13.81 percent hydrogen, and 27.40 percent nitrogen. Its

    asked by Matthew on February 20, 2012
  17. Science

    I conducted an experiment of the heat of combustion for three alcohol fuels, methyl, propyl and ethyl. The results were: Methyl - mass before was 231.81g temp of water before heating was 15 deg c. temp of water after heating was 40 deg c. mass of methyl

    asked by Paul on November 8, 2010
  18. Chemistry 11

    Find the percent composition of a compound containing sodium and chlorine if 24.34g of the compound contains 13.45g of sodium. My work: Molar mass of NaCl: MNa +MCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol Percent composition of Na: 22.99 g/mol / 58.44

    asked by Christina on November 12, 2014
  19. Chemistry

    C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield?

    asked by Molly on April 14, 2010
  20. chemistry

    Use your calculated value for the percent composition of total protein in skim milk to calculate the mass of protein that would be present in one serving size (1 cup, 240 ml) of skim milk. 15.6% percent composition

    asked by Anonymous on September 23, 2015
  21. Chem

    In making the ester methyl salicylate, mathanol is reacted with salicylic acid. If 2 grams of salicylic acid is reacted with excess methanol, what mass of ester would you expect to achieve theoretically.. show work

    asked by Anonymous on March 29, 2010
  22. Chemistry

    Hi, I'm doing a chem lab of the Percent Composition of Potassium Chlorate-A Gas Law Experiment and we need to calculate the percent of KClO3 in the sample volumetrically and gravimetrically. I need help calculating the Volumetric percent of KClO3 in sample

    asked by Katelyn on October 20, 2013
  23. Chemistry

    A compound with a percent composition by mass of 87.5% N and 12.5% H was recently discovered. What is the number of moles of Hydrogen in this compound? Atomic Mass: N = 14.01, H = 1.008

    asked by Anonymous on August 1, 2013
  24. Chemistry

    For Peroxyacyl nitrate (PAN) A compound of C,H,N,O Determine the empirical formula from the percent composition by mass: 19.8% C, 2.50% H, 11.6% N What is its molecular formula given that its molar mass is about 120g?

    asked by Amy~ on August 25, 2010
  25. Chemistry

    I had to miss a lab yesterday. Do you know of a website where I can virtually prepare methyl salicylate (oil of wintergreen)? The experiment involves salicylic acid + methyl alcohol + concentrated sulfuric acid + heat....then when two layers form collect

    asked by Stephanie on April 13, 2011
  26. Chemistry

    In my problem i need to find the mass of Ag in AgNO3. I have 3.489g of AgNO3. Help please! Determine the percentage composition from the formula. PercentAg= atomicmassAg/molmassAgNO3 Then, mass Ag= 3.489 * decimal percent above.

    asked by Jason on January 28, 2007
  27. AP Chemistry

    An organic compound was synthesized and found to contain only C, H, N, O, and Cl. It was observed that when .150g sample of the compound was burned, it produced .138g of CO2 and .0566g of H2O. All the Nitrogen in a different .200g sample of the compound

    asked by Monique on September 15, 2009
  28. Chemistry 111

    Whatis the gas produced when you add NaHCO3 to methyl salicylate?

    asked by Gaby on November 14, 2010
  29. science/chem

    calculate the percentage composition in NO2 Figure the mol mass of NO2 (atomic mass N + 2*atomic masss O) percent N= atomicmassN/molmassNO2 * 100 percent O= 2*atomicmassO/molmassNO2 *100

    asked by racheal on March 22, 2007
  30. Chemistry

    Completion To calculate the percent composition of a known compound, start with chemical formula of the compound and calculate the ________ which gives the mass of one mole of the compound. formula mass. molecular mass.

    asked by Bryan on February 4, 2007
  31. Chemistry Damon step by step for me

    you are given a solid that is a mixture of na2s04 and k2s04. A 0.215g sample of the mixture is dissolved in water. An excess of an aqueous solution of bacl2 is added. The bas04 that is formed is filtered, dried and weighed. Its mass is 0.299g. What mass of

    asked by Ken Hung on January 12, 2014
  32. Chemistry

    The percent composition by mass of an unknown compound with a molecular mass of 60.052 amu is 40.002% C, 6.7135% H, and 53.284% O. Determine the compound's empirical and molecular formulas.

    asked by Christina on October 10, 2017
  33. Chemistry

    Determine the percent composition by mass of ammonia sulfate.

    asked by asdfjkl; on February 19, 2009
  34. science

    Calculate the mass percent composition of each element in each compound.

    asked by Jordan on March 10, 2014
  35. chemistry

    How do you calculate the mass percent composition of nitrogen in NO2?

    asked by Carlos on September 27, 2014
  36. Chem

    A bottle of win contains 12.5% ethanol by volume. The density of ethanol (C2H5OH) is .79 g/mL. Calculate the concentration of ethanol in wine as mass percent and molality. I calculated molality as 2.4 m/kg, but I'm stumped on the mass percent [although I'm

    asked by Jessica on March 25, 2007
  37. chemitry who helps me

    you are given a solid that is a mixture of na2s04 and k2s04. A0.215g sample of the mixture is dissolved in water. An excess of an aqueous solution of bacl2 is added. The bas04 that is formed is filtered dried and weight. Its mass is 0.299g what mass of s04

    asked by Fai on January 5, 2014
  38. Chemistry

    I am doing a lab online and have no clue on how to get started with the following questions? Please Help me! 1. Calculate and record the following (in grams): (a) mass of NaCl by subtraction of other components: (b) measured mass of NaCl after boiling away

    asked by Melissa on October 23, 2010
  39. Chemistry

    Calculate the percent composition by mass of each element in Al(OH)3 Use at least 3 significant figures. %Al = %O = %H=

    asked by Jerry on September 18, 2011
  40. Chemistry

    calculate the percent composition, by mass, of carbon in Na2CO3. please explain how you get the answer.

    asked by denise on January 2, 2011
  41. Chemistry

    Did I do this correctly or do I need to try again? What is the mass percent of a solution when 18.6 g of table salt is added to 81.4 g of water? Mass Percent = mass of solute(g)x100 mass of solution (g) = 18.6 g x100 18.6 g + 81.4g = 18.6 g x 100 100g =

    asked by Lori on February 8, 2008
  42. Chemistry (Check)

    Classify each of these statements as always true, sometimes true, or never true. 7____AT____It is necessary to know the formula of a compound in order to calculate its percent composition. 8___ST_____If the percent by mass of carbon in methane, CH4, is

    asked by Bryan on February 11, 2007
  43. Chemistry

    Portland cement contains some SiO2. Calculate the mass percent composition of silicon in this compound.

    asked by Jenny on October 4, 2012
  44. science(chem 11)

    did a lab on separation of salt and sand. the initial mass that my teacher gave me was the stock mixture that was: salt= 54.79g; sand= 97.90g. after the experiment my mass were as follow: salt= 1.35g; sand= 3.17g. question #1 was asking about the %

    asked by Annon on October 14, 2016
  45. chemistry 11

    i did a lab on separation of salt and sand. the initial mass that my teacher gave me was the stock mixture that was: salt= 54.79g; sand= 97.90g. after the experiment my mass were as follow: salt= 1.35g; sand= 3.17g. question #1 was asking about the %

    asked by annon on October 13, 2016
  46. chemistry 11

    i did a lab on separation of salt and sand. the initial mass that my teacher gave me was the stock mixture that was: salt= 54.79g; sand= 97.90g. after the experiment my mass were as follow: salt= 1.35g; sand= 3.17g. question #1 was asking about the %

    asked by Annon on October 14, 2016
  47. chemistry

    A compound with the percent composition shown below has a molar mass of 60.10g/mol. Find its molecular formula: C, 39.97% H, 13.41% N, 46.62%

    asked by jay on February 15, 2013
  48. chemistry

    The percentage of phosphourus in a detergent product may be determined by sample treatment including the precipitation of magnesium ammonium phosphate MgNH4PO4*6H2O (MW=245.41), using an excess of both magnesium and ammonium ions. The separated ans washed

    asked by bria on September 12, 2006
  49. Chemistry

    A compound of B and H is found to have a mass percent composition of 81.1% Boron. Its empirical formula is B2H5. A mass spectrometry experiment tells us that the molecular mass is 53.3 g/mol. What is its molecular formula? So I feel like this is a trick

    asked by Nikela on March 23, 2016
  50. CHEMISTRY

    1. The percent composition by mass for peroxyacylnitrate (PAN) is:19.8% C,2.5% N, and the rest is oxygen. Determine the empirical formula of this compound. ...plz i really need your help!!!

    asked by irfan on June 6, 2013
  51. Chem

    Final question.. An alloy used in aircraft construction consists of aluminium, copper and magnesium. An 11.34g sample of alloy was treated with alkali to dissolve the aluminium, leaving a residue of mass 2.73g. This residue was treated with dilute

    asked by atriletz on January 27, 2007
  52. Chemistry

    C7H6O3+CH3OH→C8H8O3+H2O In any experiment, 1.50g of salicyclic acid is reacted with 11.20g of methanol. The yield of methyl salicylate, C8H8O3, is 1.31g. What is the percent yield? From my understanding the equation is already balanced, correct? My

    asked by Molly on April 14, 2010
  53. Chemistry

    Hank Hill loves everything about gas propane, C3H8. One day his son Bobby asks him the following set of questions about propane. Hank hems and haws for a few moments and finally tells his son he'll get back to him with answers but he has to mow the lawn

    asked by Anonymous on May 9, 2011
  54. CHEM HELP! (Check work)

    H3CA is a vitally important intemediate in the metabolism of carbohydrates. The compound is widely distributed in plant and animal tissues and fluids. H3CA is a tiprotric acid, ie, it requires three moles of NaOH to fully neutralize one mole of H3CA. a.)

    asked by Morgan on September 12, 2017
  55. Chemistry

    I need to find the average molar mass of an unknown element. The atomic mass is 120; the mass numbers of isotopes are 295, 296, 297, 298 and 299; the percent of each isotope is 2.356%, 4.325%, 15.652%, 48.452% and 29.215%. The mass of the neutron is

    asked by Joe on October 14, 2012
  56. Chemistry

    I need to find the average molar mass of an unknown element. The atomic mass is 120; the mass numbers of isotopes are 295, 296, 297, 298 and 299; the percent of each isotope is 2.356%, 4.325%, 15.652%, 48.452% and 29.215%. The mass of the neutron is

    asked by Joe on October 13, 2012
  57. Chemistry

    I've tried to solve this question multiple ways I just can't seem to get it. I just don't understand what I should be doing. An organic liquid is a mixture of methyl alcohol () and ethyl alcohol (). A 0.220- sample of the liquid is burned in an excess of

    asked by John on September 16, 2012
  58. Chemistry

    Hank Hill loves everything about gas propane, C3H8. One day his son Bobby asks him the following set of questions about propane. Hank hems and haws for a few moments and finally tells his son he'll get back to him with answers but he has to mow the lawn

    asked by Anonymous on May 9, 2011
  59. ap chem

    a solution is prepared by dissolving 4.87 g of sodium dichromate in 25.0 ml of water. (d=1.00g/mL).calculate a. the mass percent of sodium dichromate in the solution. b. the mass percent o water in the solution. c the mole fraction of sodium dichromate in

    asked by just on February 20, 2007
  60. CHEMISTRY

    Do you think it is more useful to have the percent by mass of water in hydrate or the percentage composition, assuming that you know the formula for the associated dehydrated compound? Can someone please explain what's the meaning of this question, I'm

    asked by cazzy on April 26, 2013
  61. chemistry

    15. On October 21, 1982, the Bureau if the Mint changed the composition of pennies. Instead of an alloy of 95% Cu and 5% Zn by mass, a core of 99.2 Zn and 0.8% Cu with a thin shell of copper was adopted. The overall composition of the new penny was 97.6%

    asked by kelly on September 12, 2010
  62. Chemistry

    is there an equation to find mass percent....if know concentration and and final and initial volume of a titration lab? there isnt one then how do you find mass percent? M x L = mols of titrant. From the equation, convert to mols of unknown. Mols of

    asked by Natalie on May 7, 2007
  63. chemistry

    Calculate the empirical formula for each of the following natural flavors based on their elemental mass percent composition. vanillin (responsible for the taste and smell of vanilla): C 63.15% H 5.30% O 31.55%.

    asked by Mely on September 20, 2010
  64. chemistry

    Calculate the empirical formula for each of the following natural flavors based on their elemental mass percent composition. vanillin (responsible for the taste and smell of vanilla): C 63.15% H 5.30% O 31.55%.

    asked by Mely on September 19, 2010
  65. Chemistry

    I'm supposed to compare the percent composition of gases in the atmosphere at sea level to the percent composition at high altitude.. Would the percents decrease? I don't really understand

    asked by Sara on January 16, 2013
  66. chemistry

    I need some help with calculating percent yield and percent purity of aspirin. Here's my data (questions follow): SYNTHESIS Mass of salicylic acid.., 2.0 g Volume of acetic anhydride.., 5 mL Mass of watch glass.., 22.10 g Mass of aspirin and watch glass..,

    asked by Jim on March 24, 2007
  67. chemistry

    in an experiment, 2.50g of salicylic acid is reacted with 10.31g of methanol. the yield of methyl salicylate, C8H8O3, is 1.27g. what is the percentage yield?

    asked by robert on October 13, 2012
  68. chemistry

    Name the compound (CH3)2CHCCCH3 1. 2-methyl-3-pentyne 2. 3-methyl-1-pentyne 3. 5-methyl-2-pentyne 4. 4-methyl-2-pentyne 5. 3-methyl-2-hexane 6. 4-methyl-2-pentene Can you also explain how to draw the structure? Thanks:)

    asked by Anonymous on November 30, 2011
  69. chemistry

    based on the mass of lactose that you isolate from 1 mL of skim milk, calculate the percent composition of lactose in skim milk. mass of lactose= 0.28 grams

    asked by Anonymous on September 24, 2015
  70. Organic Chemistry-pls check

    Which is the major product from acid catalyzed hydration (addition of water) of 2-methyl-2-pentene? a) 2-methyl-2-pentanol b) 2-methyl-1-pentanol c) 2-methyl-3-pentanol d) 3-methyl-3-pentanol answer: "c": 2-methyl-3-pentanol ???

    asked by K on February 24, 2008
  71. chemistry

    Calculate the mass percent composition of iron for the second one of these iron ores. fe2o3 fe3o4

    asked by royalty on October 6, 2010
  72. General Chem.

    FeCo3 Calculate the mass percent composition of iron for the third one of these iron ores.

    asked by emily chambers on September 26, 2010
  73. chemistry

    Calculate the mass percent composition of carbon in each the following carbon compounds. a) C_4H_10 b) C_6H_10 c) CCl_2F_2 d) C_8H_13O_5N

    asked by Mely on September 11, 2010
  74. chemistry

    Calculate the mass percent composition of carbon in the following carbon compound. C_8H_13O_5N I got 0.4729 as an answer but it's wrong. Please help me.

    asked by Mely on September 11, 2010
  75. Chemistry

    Calculate the mass percent composition of carbon in each the following carbon compounds. C2H2 C3H6 C2H6 C2H6O

    asked by Amee on March 4, 2013
  76. chem

    What is the empirical formula of the compound with a mass percent composition of 70.0% Fe and 30.0% O? (Type your answer using the format CH4 for CH4

    asked by sarah on April 27, 2013
  77. chem

    What is the empirical formula of the compound with a mass percent composition of 70.0% Fe and 30.0% O? (Type your answer using the format CH4 for CH4

    asked by sarah on April 27, 2013
  78. chem

    The mass of the CuSO4 x 5H2O sample is 1.664 g. The mass of the recovered copper is 1.198 g. 1. Compute the experimental percent by mass of copper in the sample: 1.1664/1.998x 100=71.81% 2. Calculate the percent copper in pure copper sulfate

    asked by Lou on April 13, 2009
  79. Chemistry

    Ethane gas, or dicarbon hexahydride, undergoes combustion to produce carbon dioxide gas and water vapor. A.) What mass of the un named reactant is required to react with moles of ethane? B.) How many molecules of the porduct, with the smaller percent

    asked by Anonymous on May 9, 2011
  80. Chemistry

    Ethane gas, or dicarbon hexahydride, undergoes combustion to produce carbon dioxide gas and water vapor. A.) What mass of the un named reactant is required to react with 2.20 moles of ethane? B.) How many molecules of the porduct, with the smaller percent

    asked by Anonymous on May 9, 2011
  81. chemistry

    A bottle of commercial hydrochloric acid solution So is labeled 37% composition by mass, density 1.19 kg/L. Calculate the concentration of solution So. 4.2 ml of So are diluted to 500ml solution called S. We titrate S with 200 ml of KOH solution of

    asked by angy on December 7, 2016
  82. chemistry

    Express the composition of each of the following compounds as the mass percents of its elements...? 59) Express the composition of each of the following compounds as the mass percents of its elements. a) formaldehyde, CH2O b) glucose, C6H12O6 c) acetic

    asked by mary on January 26, 2017
  83. Chemistry

    What types of products would you expect to find in methyl salicylate, isopentyl acetate, ethyl acetate, and octyl acetate. I'm lost. Any ideas?

    asked by Aidan on January 13, 2010
  84. Chem

    Calculate the mass percent composition of C,H, O and in aspirin. Express your answers using two significant figures. Enter your answers numerically separated by commas.

    asked by Mira on February 22, 2013
  85. Chem

    Calculate the mass percent composition of C,H, O and in aspirin. Express your answers using two significant figures. Enter your answers numerically separated by commas.

    asked by Mira on February 22, 2013
  86. Chemistry

    Four isotopes of Lead occur naturally: 204Pb (mass = 203.973037 amu) 206Pb (mass = 205.974455 amu) 207Pb (mass = 206.975885 amu) 208Pb (mass = 207.976641 amu) If the percent abundance of 204Pb and 208Pb are 1.400 and 52.40, respectively, what is the

    asked by Kayla on September 24, 2014
  87. Chemistry

    A student is given a 5.000g sample to analyze composed of tin metal with a small amount of a zinc impurity. The student dissolves the metal in concentrated nitric acid, allows the reaction to continue to completion, and heats the mixture to leave 6.341g of

    asked by Nicholas on September 18, 2017
  88. Chemistry

    What is the percent by mass of C in methyl acetate (C3H6O2)? The molecular weight of carbon is 12.0107 g/mol, of hydrogen 1.00794 g/mol, and of oxygen 15.9994 g/mol. Answer in units of %. Please work it out for me so I totally understand it. Thanks!

    asked by Randy on December 6, 2009
  89. Chemistry

    Hi! I'm having trouble solving this question, not sure how to go about starting it: Magnalium is a solid mixture of aluminum metal & magnesium metal. An irregular shaped chunk of a sample of magnalium is weighed twice, once in air (211.5g) and once in

    asked by Mila on February 26, 2016
  90. Science

    A solution is prepared by dissolving 15grams of table salt in 70grams of water. Find (a) mass percent of solute (b) mass percent of solvent.

    asked by Araceli on July 7, 2014
  91. chemistry

    sometimes,instead of percentage composition, you will have the composition of a mass sample. using the actual mass of the sample, determine the empirical formula for compounds that have the following analyses. b. a 13.07g sample of an unknown substance is

    asked by tula on February 23, 2013
  92. Chemistry

    112.00g of nitrogen gas is reacted with an excess or abundant amount of oxygen gas. The single product, a gas, is determined to have a mass of 431.92 g. Additional experiments showed that the product consisted of 2.0 moles. a) how many grams of oxygen

    asked by Maria on December 2, 2015
  93. chem

    how do u calulate percentage composition of NO2 [mass N/mass NO2] x 100 = %Nitrogen [mass O2/mass NO2] x 100 =%oxygen

    asked by san on March 17, 2007
  94. chemistry

    Shown below is a schematic representation of the water-ethanol phase diagram. Making reference to the phase diagram, explain in a few sentences how one could enrich a solution of 15 percent ethanol - 85 percent water to a composition of 60 percent ethanol

    asked by C on December 21, 2012
  95. chem

    The mass of the CuSO4 x 5H2O sample is 1.664 g. The mass of the recovered copper is 1.198 g. Calculate the percent copper in pure copper sulfate pentahydrate(this is the theoretical percent copper). One mole of copper has a mass of 63.55 g, and by

    asked by Lou on April 13, 2009
  96. Chemistry

    1. What is the percent by mass of a solution that contains 50 grams of solute dissolved in 200 grams of solution? What is the concentration of the same solution in parts per million? 2. What is the percent mass of a solution that contains 75 grams of salt

    asked by Leora on March 25, 2011
  97. chemistry

    thank you for any help possible. Given a Mass Percent 13.3% and a Mass Solvent of 325.2 g, find Mass of Solute and Mass of Solution. Mass%=13.3% Mass solvent= 325.2g solve for the Mass solute and Mass solution. This is all the information I am given.

    asked by ben 16 on December 4, 2011
  98. Organic Chemistry

    What is the white solid that quickly forms when the methyl salicylate is added to the sodium hydroxide solution? I know that it is this equation but I wanted to know what is the name of the white solid: HOC6H4COOCH3 + NaOH „³ HOC6H4COO- Na+ + CH3OH

    asked by Jonathan on April 3, 2010
  99. to dr bob..chemistry

    bottle of wine contains 13.1% ethanol by volume. The density of ethanol (C2H5OH) is 0.789 g/cm3. Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent _______% molality ______mol/kg Thanks Responses AP CHEMMMM -

    asked by Lawrence on November 30, 2008
  100. Chemistry

    A particular metallic element, M, has a heat capacity of 0.36 J*g*K, and it forms an oxide that contains 2.90 grams of M per gram of oxygen. (a) Using the law of Dulong and Petit (Cp x M = 25 J*mol*K), estimate the molar mass of the metal M [Answer: _____

    asked by . on October 22, 2009

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